// Utils

emptyFunc = function(){};
falseFunc = function(){ return false };

isImgBroken = function(img){
  return (img.height == 0 || img.width == 0 || img.height == NaN || img.width == NaN)
}

isEmptyObject = function(obj) {
    for (key in obj) {
        if (obj.hasOwnProperty(key)) return false;
    }
    return true
}

String.prototype.trim = function(){ return this.replace(/^\s+|\s+$/g,'') }

function isCSSPropertySupported(prop){ return prop in document.body.style }

function track(group, name) {
    if (typeof pageTracker !== 'undefined') {
        pageTracker._trackEvent(group, name,
                                typeof Nick !== 'undefined' ? Nick : 'anon');
    }
}

// generate a new CSS rule and apply it immediately
// (more persistent than dumping a style tag)
window.cssRule = function (selector, declaration) {
	var x = document.styleSheets,y=x.length-1;
	x[y].insertRule(selector+"{"+declaration+"}",x[y].cssRules.length);
	$(selector).css(declaration.split(": "));
};



var Log = {
    "Levels": ['info', 'warn', 'error'],
    "AjaxSubmitLevels": ['warn', 'error'],
    "AjaxSubmitPath": "/logerror",
    
    "SupplementalInfo": function() {
        return { 'user': UserInfo && UserInfo.nick };
    },

    "ajaxSubmit": function(level, component, msg) {
        var info = Log.SupplementalInfo();
        var data = { 'level': level, 'component': component, 'msg': msg };
        $.extend(info, data);
        
        $.ajax({type: 'POST',
                timeout: 5000,
                url: Log.AjaxSubmitPath,
                data: info
               });
    },
    
    "initialize": function() {
        $.each(Log.Levels, function(i, level) {
            Log[level] = function(component, msg) {
                if (window.console && window.console[level])
                    window.console[level](args);
                if (Log.AjaxSubmitLevels.indexOf(level) != -1)
                    Log.ajaxSubmit(level, args);
            };
        });
    }
};

Log.initialize();


// Time how long a function takes to complete
function timeFunc(f){
  var start = new Date().getTime();
  var res = f();
//  console.log((new Date().getTime()) - start + " msecs");
  return res;
}

window.requestAnimFrame = (function(){
  return  window.requestAnimationFrame       || 
          window.webkitRequestAnimationFrame || 
          window.mozRequestAnimationFrame    || 
          window.oRequestAnimationFrame      || 
          window.msRequestAnimationFrame     || 
          function( callback ){
            window.setTimeout(callback, 1000 / 60);
          };
})();